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author | Jack Sangdahl <[email protected]> | 2025-07-13 21:16:55 -0600 |
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committer | Jack Sangdahl <[email protected]> | 2025-07-13 21:16:55 -0600 |
commit | 4349ad85a06f47f84abbfbdb98427083ed5ca430 (patch) | |
tree | 9c2c0c6719578f39e6aef055d786be1b1287cbb4 | |
parent | e608af56c0aba66323fb253f4bd2dfe3d2b38fb8 (diff) | |
download | leetcode-4349ad85a06f47f84abbfbdb98427083ed5ca430.tar.gz leetcode-4349ad85a06f47f84abbfbdb98427083ed5ca430.zip |
-rw-r--r-- | convert_bin_ll_int.c | 30 | ||||
-rw-r--r-- | convert_bin_ll_int.py | 36 |
2 files changed, 66 insertions, 0 deletions
diff --git a/convert_bin_ll_int.c b/convert_bin_ll_int.c new file mode 100644 index 0000000..308b204 --- /dev/null +++ b/convert_bin_ll_int.c @@ -0,0 +1,30 @@ +// 1290. Convert Binary Number in a Linked List to Integer +#include "leetcode.h" + +/* + * given 'head' which is a reference node to a singly linked list. the value of + * each node in the linked list is either 0 or 1. the linked list holds the + * binary representation of a number. return the decimal value of the number in + * the linked list. the most significant bit is at the head of the linked list. + */ + +int getDecimalValue(struct ListNode *head) { + int ans = 0; + while (head) { + ans <<= 1; + ans += head->val; + head = head->next; + } + return ans; +} + +int main() { + struct ListNode *h1 = listnode_create(1); + h1->next = listnode_create(0); + h1->next->next = listnode_create(1); + struct ListNode *h2 = listnode_create(0); + printf("%d\n", getDecimalValue(h1)); // expect: 5 + printf("%d\n", getDecimalValue(h2)); // expect: 0 + listnode_free(h1); + listnode_free(h2); +} diff --git a/convert_bin_ll_int.py b/convert_bin_ll_int.py new file mode 100644 index 0000000..316dd4b --- /dev/null +++ b/convert_bin_ll_int.py @@ -0,0 +1,36 @@ +# 1290. Convert Binary Number in a Linked List to Integer + +""" +given 'head' which is a reference node to a singly linked list. the value of +each node in the linked list is either 0 or 1. the linked list holds the +binary representation of a number. return the decimal value of the number in +the linked list. the most significant bit is at the head of the linked list. +""" + + +# Definition for singly-linked list. +class ListNode(object): + def __init__(self, val=0, next=None): + self.val = val + self.next = next + + +class Solution(object): + def getDecimalValue(self, head): + """ + :type head: Optional[ListNode] + :rtype: int + """ + ans = 0 + while head: + ans = 2 * ans + head.val + head = head.next + return ans + + +if __name__ == "__main__": + obj = Solution() + h1 = ListNode(1, ListNode(0, ListNode(1))) + h2 = ListNode(0) + print(obj.getDecimalValue(h1)) + print(obj.getDecimalValue(h2)) |